Moondog (Mock moon) — a relatively rare bright circular spot on a lunar halo, caused by the refraction of light from ice crystals in cirrus clouds.

The Moonies — a religious cult that had a strong hold on (usually) young people they recruited. Named for its Korean founder Sun Myung Moon.

Blood moon — the reddish colour of the moon when it is in eclipse between the earth and the sun.

And then there is our Canadian dollar – the loonie. I suppose it was meant to be named after that beautiful bird, the loon, but to me is seemed like lunacy to downgrade our currency by making our dollar into a piece a small change.

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Do you know of some moon expressions? How about moon boots? The list seems to be endless.